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http://dx.doi.org/10.3807/KJOP.2005.16.2.121

Analysis of thermal properties of the photo polymer hologram for practical applications  

Kim, Jung-Hoi (Dept. of Computer&Communication Eng., Chungbuk Nat'l Univ. Industrial Technology Research Park)
Lee, Hang-Su (Dept. of Computer&Communication Eng., Chungbuk Nat'l Univ. Industrial Technology Research Park)
Kim, Nam (Dept. of Computer&Communication Eng., Chungbuk Nat'l Univ. Industrial Technology Research Park)
Jeon, Seok-Hee (Electronic Engineering Department, Incheon University)
Publication Information
Korean Journal of Optics and Photonics / v.16, no.2, 2005 , pp. 121-127 More about this Journal
Abstract
This paper presents the thermal characteristics of a Bragg grating recorded in photopolymer. We record hologram gratings using a 532 nm Nd : YAG laser in DuPont HRF 150-38 photopolymer films and analyze the diffraction efficiency versus thermal exposure conditions. For the case of recording after heating, the diffraction efficiency of the hologram is more than $70\%$ at $100^{\circ}C$ but is decreased exponentially at temperatures over $100^{\circ}C$. It is observed in the recording before heating that the diffraction efficiency of the hologram fixed by a UV light is increased to approximately $10\%$ at $100^{\circ}C$, but the holograms are erased at temperatures over $120^{\circ}C$.
Keywords
Bragg grating; Photopolymer; diffraction efficiency; UV light; hologram;
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